So I was wondering about something, and I decided to post to satiate my curiosity. Apple doesn't check the ECID against any sort of database when you request SHSH blobs to make sure it's actually for the device requested. So just for the heck of it I fetched a set of SHSH blobs for 5.1.1 for my iPhones ECID number, but for the iPad (since iPad 5.1.1 SHSH blobs are still signed).

I'm assuming that these are totally useless, since the device type not just the ECID is part of the signing process, correct?